Slouching or rolling your shoulders forward shortens your chest muscles and reduces their flexibility.
肩膀低垂或是内旋会使胸肌缩短并且弹性降低。
Rotate shoulders forward in a circular motion.
旋转肩膀向前作圆周运动。
Technician: Put your hands like this and your shoulders forward, rest your chin here.
化验员:两手放成这样,双肩前展,下巴搁在这儿。
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